19-02-2013, 02:06 PM
3 IN 1 PORTABLE FUNCTIONING MACHINE (DRILLING, CUTTING & SHAPPING) BY USING SINGLE MOTOR
PORTABLE FUNCTIONING.docx (Size: 166.7 KB / Downloads: 124)
INTRODUCTION
It is multipurpose machine and applicable to all kinds of complex, difficult and high quality products also easy to operate. With the help of this machine we can do mainly three major machining processes which are classified as Cutting, Drilling and Shaping. The main advantage of this machine is that we can do all above process in step by step manner by without changing the place of motor.
We can perform more than one work with using only one motor of power 0.5 HP. Easily moved from one location to another are very useful. Very useful for small and light job It covered to small area. Suitable for processing Metal, Aluminium, Wood and other light materials Excellent advantage of various functions, small occupation and economization.
Drilling Operation:-
Drilling is a cutting process that uses a drill bit to cut or enlarge a hole of circular cross-section in solid materials. The drill bit is a rotary cutting tool, often multipoint. The bit is pressed against the work piece and rotated at rates from hundreds to thousands of revolutions per minute. This forces the cutting edge against the work piece, cutting off chips from what will become the hole being drilled.[1]
Cutting Operation:-
Cutting is the separation of a physical object, or a portion of a physical object, into two portions, through the application of an acutely directed force.
Selecting the correct blade for the material to be cut is important when setting up a hacksaw. High Speed Steel (HSS) blades are used for tough, resistant materials whilst High Carbon Steel blades are for general cutting. Selecting the correct number of teeth per inch (25mm) is also important. The general rule is that at least three teeth should extend across the surface of the material to be cut. [2]
Shaping Operation:-
Shaping is a material removal process in which a cutting tool takes mass and shapes a stationary object to produce a sculpted or plane surface.
The shaping process is used to machine flat metal surfaces especially where a large amount of metal has to be removed. Other machines such as milling machines are much more expensive and are more suited to removing smaller amounts of metal, very accurately.
The reciprocating mechanism of shaping machine is done with the help of rotating disc. As the disc rotates the top of the machine moves forwards and backwards, pushing a cutting tool. The cutting tool removes the metal from work which is carefully bolted down. [2]
DESCRIPTION
i. BUSHES:- bushes are used to keep a distance for giving space to the nut which is attached between two connecting or rotating parts. Here in this machine bushes are used to give space for spur gear which is attached on the spindle.[1]
ii. REDUCTION GEAR:- Reduction gear is used to reduces an input speed to a slower output speed. The main advantage of reduction gear is the motor doesn't have to work as hard to spin the wheel. [3]
iii. PEDESTAL BEARING:- This type of bearing is used for higher speeds, heavy loads and large sizes. This bearing facilitates the placements and removal of the of the shaft from the bearing. Unlike the solid bearing which are to be inserted end-wise.
[4]
BEVEL GEAR:- Bevel gears are gears where the axes of the two shafts intersect and the tooth-bearing faces of the gears themselves are conically shaped. Bevel gears are most often mounted on shafts that are 90 degrees apart, but can be designed to work at other angles as well. The pitch surface of bevel gears is a cone.[5]